The Automatic Tension Meter is designed for precise measurement of surface tension (liquid-gas interface) and interfacial tension (liquid-liquid interface) across a wide range of industrial and laboratory environments. It is ideally suited for use in:
The instrument operates reliably in controlled laboratory conditions with ambient temperatures between 10–30°C and humidity below 85% RH, ensuring stable and accurate measurements. Its compact size, integrated printer, and optional RS232 data output make it suitable for both benchtop testing and integration into data management systems.
KDHG-220P Variable Frequency Transformer Characteristics Comprehensive Tester
Efficient and accurate power equipment testing solution
Application Applications
Power system maintenance and overhaul
Provide comprehensive performance evaluation for current transformers (CT) and voltage transformers (PT) in substations, including parameter testing of volt ampere characteristics, transformation ratio, polarity, etc., to ensure the stable operation of the power system.
Suitable for regular inspection and maintenance of various protection, metering, TP CT, and electromagnetic unit PTs, improving the safety and reliability of the power grid.
New equipment acceptance and debugging
When constructing or upgrading power facilities, it is used to conduct detailed pre factory testing on newly installed CT and PT to ensure compliance with national and international standards (such as GB20840.1, IEC60044-1).
Provide accurate error curve analysis to help engineers determine whether the equipment meets design specifications and ensure the quality and performance of new equipment.
Research and Education
As a teaching and research tool in universities and research institutions, it is used for experimental courses and scientific research projects in electrical engineering majors to help students and researchers gain a deeper understanding of the working principles and testing methods of transformers.
Support secondary winding resistance measurement, AC load testing, and other functions to meet the detailed research needs of transformer characteristics in laboratory environments.
industrial applications
In industrial production environments, in order to ensure the safe operation of large electrical equipment, the status of transformers is regularly monitored to prevent potential failures and reduce the risk of power outages.
The lightweight design is easy to carry to the site for use, especially suitable for scenarios that require frequent mobile operations, such as equipment testing in remote locations such as wind farms and hydropower stations.
The Partial Discharge Detector is designed for use in a wide range of power system environments, including:
Manufacturing plants – for quality control of transformers, cables, and switchgear.
Power substations – for on-site commissioning and routine maintenance.
Transmission & distribution networks – for condition assessment of high-voltage equipment.
Industrial facilities – for predictive maintenance of critical electrical assets.
Laboratories – for R&D and type testing of insulation systems.
Operates reliably in temperatures from -10°C to +40°C and humidity ≤80% RH, making it suitable for both indoor and field applications.
The KDYD-2845kV Intelligent Turn-to-Turn Withstand Voltage Tester is primarily used in industrial environments with strict requirements for electrical insulation performance and large-scale production or maintenance. Its typical application settings have the following characteristics:
Motor and Transformer Manufacturing Workshops/Production Lines: This is the primary application scenario. The instrument is integrated into the final stage of production lines for motors (especially medium and large AC/DC motors) and transformers, serving as a mandatory safety inspection before delivery. On the production line, operators use its "one-button test" and automatic judgment features to perform rapid and efficient turn-to-turn insulation tests on every finished product, ensuring no critical defects like inter-turn short circuits are present before shipment.
Large Equipment Maintenance and Repair Shops: In power plants, heavy machinery factories, or specialized motor repair centers, the instrument is used to verify the condition of motors, generators, and large transformers undergoing repair or overhaul. By comparing the test waveforms with original standard waveforms or those from normally functioning units of the same model, technicians can accurately determine whether the windings were damaged during repair and if the turn-to-turn insulation has been restored to good condition.
Research and Quality Inspection Laboratories: In university, research institute, or third-party testing laboratories, the instrument is used for insulation performance research on new materials and processes, as well as for type testing of products. Its high output voltage of up to 45kV and precise waveform analysis capabilities allow it to simulate extreme operating conditions, providing critical data for evaluating the dielectric limits of new insulating materials and verifying the reliability of product designs.
Environmental Requirements: Due to its large size (180kg cabinet-type unit) and equipped with casters, the instrument is typically placed in a spacious, indoor environment with a level floor. According to the documentation, its normal operating temperature range is 0–40°C, with relative humidity not exceeding 80% at 40°C. Therefore, it should be avoided in harsh environments that are damp, dusty, or subject to drastic temperature changes to ensure test accuracy and equipment longevity. Its sloped display and ergonomic layout also require adequate lighting and workspace in the operating area.
In summary, the KDYD-2845kV Intelligent Turn-to-Turn Withstand Voltage Tester serves three major fields: industrial manufacturing, equipment maintenance, and scientific research/testing. Its application environment emphasizes safety, standardization, and rigorous quality control.
The KDYDJ-6kVA/100kV Series Resonant Power Frequency Withstand Voltage Test Set, comprising its compact control box and lightweight oil-immersed test transformer, is ideally suited for on-site preventive maintenance and acceptance testing of medium-voltage electrical equipment in power distribution networks.
A typical scenario involves a team from a municipal power supply company conducting routine insulation checks on newly installed or repaired equipment at a 10kV substation. The technicians need to verify the integrity of components such as:
In this field environment, the test set's features are crucial:
By applying the specified high voltage (e.g., 42kV for a 10kV system) for a duration like 1 minute, engineers can assess the insulation level, identify any potential defects (such as cracks or moisture ingress), and ensure the equipment meets safety standards before being energized, thereby guaranteeing the reliability and safety of the power grid. The device's portability, ease of use, and reliable performance make it an essential tool for such field applications.
The instrument is a specialized device used to detect inter-turn short circuits in generator rotor windings. By measuring parameters such as the rotor winding's AC impedance and power loss under different conditions, and plotting its characteristic curves, it diagnoses the health status of the rotor winding.
Power Systems and Power Generation Enterprises:
Test Conditions:
Multi-Function Extended Applications: The instrument is typically multifunctional and can also be used for:
Other Application Fields:
In summary, the Generator Rotor Impedance Tester is primarily used in power systems, various power plants, and large industrial enterprises for preventive testing and fault diagnosis of rotor windings in critical rotating equipment such as generators and motors, ensuring safe and stable operation of the equipment.
This instrument is a specialized device developed in accordance with national regulations for measuring the resistance of conductive shoes. It has the characteristics of small size, light weight, and high accuracy. The instrument adopts a touch screen integrated design, with simple operation and one click testing. It is equipped with a micro printer, which can print in real-time or query.
The Portable Relay Protection Tester is widely used in the commissioning, maintenance, and troubleshooting of power system protection and automation equipment. Its precision output, flexible test modes, and rugged handheld design make it an essential tool in a variety of electrical engineering environments:
Substation Commissioning & Maintenance
Perform on-site testing of protective relays, including overcurrent, distance, differential, and directional relays, ensuring correct settings and reliable operation before energization.
Power Generation Plants
Verify generator protection schemes such as differential protection, loss-of-excitation, reverse power, and low/high frequency tripping functions.
Transmission and Distribution Networks
Test underfrequency load shedding (UFLS) relays, auto-reclosing (AR) logic, and synchronization check (sync-check) devices to maintain grid stability and restore service efficiently after faults.
Industrial Power Systems
Validate motor protection relays, transformer differential relays with harmonic restraint, and feeder protection in manufacturing, mining, and petrochemical facilities.
Railway & Traction Power Systems
Conduct protection tests on AC/DC traction substations where compact, battery-powered equipment is required for field access.
Renewable Energy Installations
Commission protection systems in solar PV plants and wind farms, particularly for islanding detection, anti-islanding protection, and grid-synchronization verification.
Relay Manufacturing & Calibration Labs
Use as a portable reference source for factory acceptance tests (FAT), R&D validation, and periodic calibration of protection IEDs.
Training & Education
Support hands-on training for engineers and technicians in relay behavior, fault simulation, and protection logic analysis.
With its comprehensive test functions—including manual output, state sequencing, harmonics injection, and millisecond-level timing—the tester ensures accurate evaluation of both conventional electromechanical relays and modern digital protection devices in diverse operational scenarios.
This device is mainly suitable for testing the breakdown strength and voltage resistance of solid insulation materials (such as plastics, rubber, laminated materials, films, resins, mica, ceramics, glass, insulation paints, and other insulation materials and components) under power frequency voltage or DC voltage. Widely used in the design and manufacturing of high-voltage breakdown tests in the power electronics industry, the Ministry of Machinery Industry, research institutes, military research, and insulation material production units.
The KDJ5-AMI Safety Helmet Impact and Penetration Tester is widely used in various industries and research institutions to ensure the safety and reliability of protective headgear. Below are key application scenarios:
Construction Industry
On construction sites, this tester is essential for quality control of safety helmets used by workers. It enables on-site or laboratory-based inspection of newly procured helmets, verifying their ability to absorb impact energy and resist penetration from falling objects, thus ensuring compliance with national safety standards such as GB/T 2811-2007 and GB/T 2812-2006.
Mining and Tunneling Operations
In underground mining and tunneling environments where the risk of rock falls and sharp object impacts is high, the tester is used to evaluate the protective performance of safety helmets under extreme conditions, ensuring that head protection equipment meets rigorous safety requirements.
Power and Electrical Utilities
Utility companies use this equipment to test helmets designed for electrical work, ensuring they provide adequate impact and penetration resistance while maintaining compliance with industry-specific safety protocols.
Occupational Safety Laboratories
Governmental and third-party testing laboratories employ the KDJ5-AMI tester for certification, routine inspection, and comparative analysis of safety helmets from different manufacturers. Its high-precision sensors and automated data processing ensure reliable and repeatable test results.
Research and Development
Helmet manufacturers and material scientists use the tester during the product development phase to evaluate new materials, designs, and structural improvements. The accurate force measurement and peak value recording support innovation in lightweight, high-strength protective headgear.
Industrial Manufacturing
In factories and industrial plants, especially those with overhead operations or heavy machinery, regular testing of safety helmets ensures ongoing worker protection and adherence to occupational health and safety regulations.
Emergency Response and Rescue Services
Firefighters, rescue workers, and other emergency personnel rely on high-performance helmets. This tester helps verify that their helmets can withstand extreme mechanical stress during operations.
With its robust design, automated control system, and compliance with international testing standards, the KDJ5-AMI Safety Helmet Impact and Penetration Tester serves as a critical tool in safeguarding human life across high-risk industries.
In a busy urban substation, maintenance engineers are preparing to synchronize two 10kV power lines after routine upgrades. To ensure safe and accurate phase alignment, they deploy the KDZD3540 Wireless High-Voltage Phasing Detector specifically designed for switchgear applications.
Standing at a safe distance outside the metal-enclosed switchgear (MNS type), the technicians place the compact detectors near the A, B, and C phase conductors inside the cabinet without any direct contact. The wireless system transmits real-time phase data to the main receiver unit, which features a 3.5-inch color LCD screen. Within seconds, the device simultaneously displays the phase angles, voltage levels, and sequence information for all three phases.
Thanks to its clear digital display and voice guidance—announcing "Same Phase" or "Different Phase"—the team quickly confirms correct phasing before closing the circuit breaker. The built-in data storage records the results for documentation, and the wireless range of up to 30 meters allows flexible positioning even in tight or hazardous environments.
This non-contact, wireless solution minimizes arc flash risks, enhances operational efficiency, and ensures compliance with international safety standards such as IEC 61481 and DL/T 971—2017, making it ideal for live-line work in modern power distribution systems
KDHG-HT All-in-One Transformer Tester is designed for versatile use in diverse environments, including:
Power System Maintenance
Factory Acceptance Testing
Research & Development Laboratories
Field Commissioning
Educational & Training Institutions
The KDJB-1200Y Six-Phase Relay Protection Tester is ideally suited for use in power substations, power plants, and electrical testing laboratories. It is widely applied in commissioning, routine maintenance, and troubleshooting of modern digital and electromechanical protection relays in high-voltage and medium-voltage power systems. The instrument performs reliably in field environments with variable temperature and humidity, making it a trusted tool for protection engineers during system upgrades, relay calibration, and fault simulation tests. Its robust design and portable size also make it effective in mobile testing units and on-site service operations.
The KDDT-10A Ground Conductance Tester is designed for a wide range of environments where grounding system integrity and safety are critical:
Industrial Facilities:
Power Systems:
Building Infrastructure:
Research & Development:
Outdoor & Remote Sites:
Environmental Tolerance:
